Home / 21,125.16-31,684.86-5,541.48

Finding the Fourth Proportional to 21,125.16, 31,684.86 and 5,541.48

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Solution

The fourth proportional to 21,125.16, 31,684.86 and 5,541.48 is: 8,311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.16 : 31,684.86 = 5,541.48 : x
  2. Step 2: Convert to fraction form
    21,125.16/31,684.86 = 5,541.48/x
  3. Step 3: Cross multiply
    21,125.16x = 31,684.86 × 5,541.48
  4. Step 4: Simplify right side
    21,125.16x = 175,581,017.99
  5. Step 5: Solve for x
    x = 175,581,017.99/21,125.16
  6. Step 6: Final answer
    x = 8,311.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.